
3.2 Installation of the PBX
3.2.6Backup Battery Connection
The backup batteries and
User-supplied Items
•Backup Batteries: VRLA (Valve Regulated Lead Acid) 12 V DC × 3
•
WARNING
THERE IS A DANGER OF EXPLOSION IF BACKUP BATTERIES ARE INCORRECTLY REPLACED. REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE BATTERY MANUFACTURER. DISPOSE OF USED BATTERIES ACCORDING TO THE MANUFACTURER'S INSTRUCTIONS.
CAUTION
•Make sure that the
•Be sure to comply with applicable local regulations (e.g., laws, guidelines).
•Make sure that the polarities of the backup batteries and wiring are correct.
•Make sure that you do not short the backup batteries or cables.
•Use the correct type of
Notes
•Turn on the battery switch on the PSU only after the installation of the PBX is finished and AC power is available.
•The recommended maximum capacity is 28 Ah, to maintain effective battery charge.
•Make sure that the type and capacity of the 3 backup batteries are identical.
•The
•For details about the backup batteries, refer to the manual for the batteries.
Backup Power Supply Duration
The length of time that backup batteries can power the PBX varies depending on the total load figure. For how to calculate the load figure from the connected items, refer to "Load Figure Calculation".
Examples
Battery Capacity | Total Load Figure | Backup Power Supply Duration*1 |
| 64 | 11 h |
|
|
|
28 Ah | 128 | 5.5 h |
|
|
|
| 512 | 3 h |
|
|
|
*1 The duration may vary depending on the conditions.
Installation Manual
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